<template>
  <Header></Header>

  <!-- 主内容区域 -->
  <main class="container max-w-screen-xl mx-auto p-4 px-6">
    <!-- grid 表格布局，分为 4 列 -->
    <div class="grid grid-cols-4 gap-7">
      <!-- 左边栏，占用 3 列 -->
      <div class="col-span-4 md:col-span-3 mb-3">
        <!-- 文章详情 -->
        <!-- 文章卡片父容器 -->
        <div
          class="w-full p-5 mb-3 bg-white border border-gray-200 rounded-lg dark:bg-gray-800 dark:border-gray-700"
        >
          <!-- 面包屑 -->
          <nav class="flex text-gray-400" aria-label="Breadcrumb">
            <ol class="inline-flex items-center space-x-1 md:space-x-3">
              <li class="inline-flex items-center">
                <a
                  href="#"
                  class="inline-flex items-center text-sm font-medium hover:text-blue-600 dark:text-gray-400 dark:hover:text-white"
                >
                  <svg
                    class="w-3 h-3 mr-2.5"
                    aria-hidden="true"
                    xmlns="http://www.w3.org/2000/svg"
                    fill="currentColor"
                    viewBox="0 0 20 20"
                  >
                    <path
                      d="m19.707 9.293-2-2-7-7a1 1 0 0 0-1.414 0l-7 7-2 2a1 1 0 0 0 1.414 1.414L2 10.414V18a2 2 0 0 0 2 2h3a1 1 0 0 0 1-1v-4a1 1 0 0 1 1-1h2a1 1 0 0 1 1 1v4a1 1 0 0 0 1 1h3a2 2 0 0 0 2-2v-7.586l.293.293a1 1 0 0 0 1.414-1.414Z"
                    />
                  </svg>
                  首页
                </a>
              </li>
              <li>
                <div class="flex items-center">
                  /
                  <a
                    href="#"
                    class="ml-1 text-sm font-medium md:ml-3 dark:text-gray-400 dark:hover:text-white"
                    >正文</a
                  >
                </div>
              </li>
            </ol>
          </nav>

          <!-- 文章 -->
          <article>
            <!-- 文章标题 -->
            <h1 class="mt-4 font-bold text-3xl">{{ article.title }}</h1>

            <!-- 发布时间 -->
            <span class="mr-1 hidden md:inline">发表于</span>
            {{ article.createTime }}

            <!-- 分类 -->
            <a
              @click="
                goCategoryArticleListPage(
                  article.categoryId,
                  article.categoryName
                )
              "
              class="cursor-pointer mr-1 hover:underline"
              >{{ article.categoryName }}</a
            >

            <!-- 阅读量 -->
            <span class="mr-1 hidden md:inline">阅读量</span>
            {{ article.readNum }}
          </article>

          <!-- 正文 -->
          <div
            ref="articleContentRef"
            class="mt-5 article-content"
            v-viewer
            v-html="article.content"
          ></div>
          <!-- 标签集合 -->
          <div v-if="article.tags && article.tags.length > 0" class="mt-5">
            <span
              @click="goTagArticleListPage(tag.id, tag.name)"
              v-for="(tag, index) in article.tags"
              :key="index"
              class="inline-block mb-1 cursor-pointer bg-green-100 text-green-800 text-xs font-medium mr-2 px-3 py-1 rounded-full hover:bg-green-200 hover:text-green-900 dark:bg-green-900 dark:text-green-300"
            >
              # {{ tag.name }}
            </span>
          </div>

          <!-- 上下篇 -->
          <nav class="flex flex-row mt-7">
            <!-- basis-1/2 用于占用 flex 布局的一半空间 -->
            <div class="basis-1/2">
              <!-- h-full 指定高度占满 -->
              <a
                v-if="article.preArticle"
                @click="router.push('/article/' + article.preArticle.articleId)"
                class="cursor-pointer flex flex-col h-full p-4 mr-3 text-base font-medium text-gray-500 bg-white border border-gray-300 rounded-lg hover:border-blue-500 hover:bg-gray-100 hover:text-gray-700 dark:bg-gray-800 dark:border-gray-700 dark:text-gray-400 dark:hover:bg-gray-700 dark:hover:text-white"
              >
                <div>
                  <svg
                    class="inline w-3.5 h-3.5 mr-2 mb-1"
                    aria-hidden="true"
                    xmlns="http://www.w3.org/2000/svg"
                    fill="none"
                    viewBox="0 0 14 10"
                  >
                    <path
                      stroke="currentColor"
                      stroke-linecap="round"
                      stroke-linejoin="round"
                      stroke-width="2"
                      d="M13 5H1m0 0 4 4M1 5l4-4"
                    ></path>
                  </svg>
                  上一篇
                </div>
                <div>{{ article.preArticle.articleTitle }}</div>
              </a>
            </div>

            <div class="basis-1/2">
              <!-- text-right 指定文字居右显示 -->
              <a
                v-if="article.nextArticle"
                @click="
                  router.push('/article/' + article.nextArticle.articleId)
                "
                class="cursor-pointer flex flex-col h-full text-right p-4 text-base font-medium text-gray-500 bg-white border border-gray-300 rounded-lg hover:border-blue-500 hover:bg-gray-100 hover:text-gray-700 dark:bg-gray-800 dark:border-gray-700 dark:text-gray-400 dark:hover:bg-gray-700 dark:hover:text-white"
              >
                <div>
                  下一篇
                  <svg
                    class="inline w-3.5 h-3.5 ml-2 mb-1"
                    aria-hidden="true"
                    xmlns="http://www.w3.org/2000/svg"
                    fill="none"
                    viewBox="0 0 14 10"
                  >
                    <path
                      stroke="currentColor"
                      stroke-linecap="round"
                      stroke-linejoin="round"
                      stroke-width="2"
                      d="M1 5h12m0 0L9 1m4 4L9 9"
                    ></path>
                  </svg>
                </div>
                <div>{{ article.nextArticle.articleTitle }}</div>
              </a>
            </div>
          </nav>
        </div>
      </div>

      <!-- 右边侧边栏，占用一列 -->
      <aside class="col-span-4 md:col-span-1">
        <!-- <div class="sticky top-[5.5rem]"> -->
        <!-- 博主信息 -->
        <UserInfoCard></UserInfoCard>

        <!-- 分类 -->
        <CategoryListCard></CategoryListCard>

        <!-- 标签 -->
        <TagListCard></TagListCard>
        <!-- </div> -->
        <!-- 文章目录 -->
        <Toc></Toc>
      </aside>
    </div>
  </main>

  <!-- 返回顶部 -->
  <ScrollToTopButton></ScrollToTopButton>

  <Footer></Footer>
</template>

<script setup>
import Header from "@/layouts/frontend/components/Header.vue";
import Footer from "@/layouts/frontend/components/Footer.vue";
import UserInfoCard from "@/layouts/frontend/components/UserCardInfo.vue";
import TagListCard from "@/layouts/frontend/components/TagListCard.vue";
import CategoryListCard from "@/layouts/frontend/components/CategoryListCard.vue";
import { getArticleDetail } from "@/api/frontend/article";
import { useRoute, useRouter } from "vue-router";
import { ref, watch, onMounted } from "vue";
import hljs from "highlight.js";
// 代码高亮样式
import "highlight.js/styles/tokyo-night-dark.css";
import ScrollToTopButton from "@/layouts/frontend/components/ScrollToTopButton.vue";
import Toc from "@/layouts/frontend/components/Toc.vue";

const route = useRoute();
const router = useRouter();
// 打印文章 ID
console.log(route.params.articleId);

// 文章数据
const article = ref({});

// 获取文章详情
function refreshArticleDetail(articleId) {
  getArticleDetail(route.params.articleId).then((res) => {
    // 该文章不存在(错误码为 20010)
    if (!res.success && res.errorCode == "20010") {
      // 手动跳转 404 页面
      router.push({ name: "NotFound" });
      return;
    }

    article.value = res.data;
  });
}
refreshArticleDetail(route.params.articleId);

// 跳转分类文章列表页
const goCategoryArticleListPage = (id, name) => {
  // 跳转时通过 query 携带参数（分类 ID、分类名称）
  router.push({ path: "/category/article/list", query: { id, name } });
};

// 跳转标签文章列表页
const goTagArticleListPage = (id, name) => {
  // 跳转时通过 query 携带参数（标签 ID、标签名称）
  router.push({ path: "/tag/article/list", query: { id, name } });
};

// 监听路由
watch(route, (newRoute, oldRoute) => {
  // 重新渲染文章详情
  refreshArticleDetail(newRoute.params.articleId);
});

// 正文 div 引用
const articleContentRef = ref(null);
onMounted(() => {
  // 使用 MutationObserver 监视 DOM 的变化
  const observer = new MutationObserver((mutationsList) => {
    for (let mutation of mutationsList) {
      if (mutation.type === "childList") {
        // 获取所有 pre code 节点
        let highlight = document.querySelectorAll("pre code");
        // 循环高亮
        highlight.forEach((block) => {
          hljs.highlightBlock(block);
        });
      }
    }
  });

  // 配置监视子节点的变化
  const config = { childList: true, subtree: true };
  // 开始观察正文内容变化
  observer.observe(articleContentRef.value, config);
});
</script>
<style scoped>
/* code 样式 */
::v-deep(.article-content code:not(pre code)) {
  padding: 2px 4px;
  margin: 0 2px;
  font-size: 95% !important;
  border-radius: 4px;
  color: rgb(41, 128, 185);
  background-color: rgba(27, 31, 35, 0.05);
  font-family: Operator Mono, Consolas, Monaco, Menlo, monospace;
}

/* pre code 样式 */
::v-deep(code) {
  font-size: 98%;
}

::v-deep(pre) {
  margin-bottom: 20px;
}

::v-deep(pre code.hljs) {
  padding-top: 2rem;
  padding-left: 1rem;
  padding-right: 1rem;
  padding-bottom: 0.7rem;
  border-radius: 6px;
}

::v-deep(pre:before) {
  background: #fc625d;
  border-radius: 50%;
  box-shadow: 20px 0 #fdbc40, 40px 0 #35cd4b;
  content: " ";
  height: 10px;
  margin-top: 10px;
  margin-left: 10px;
  position: absolute;
  width: 10px;
}
/* h1, h2, h3, h4, h5, h6 标题样式 */
::v-deep(
    .article-content h1,
    .article-content h2,
    .article-content h3,
    .article-content h4,
    .article-content h5,
    .article-content h6
  ) {
  color: #292525;
  line-height: 150%;
  font-family: PingFang SC, Helvetica Neue, Helvetica, Hiragino Sans GB,
    Microsoft YaHei, "\5FAE\8F6F\96C5\9ED1", Arial, sans-serif;
}

::v-deep(.article-content h2) {
  line-height: 1.5;
  font-weight: 700;
  font-synthesis: style;
  font-size: 24px;
  margin-top: 40px;
  margin-bottom: 26px;
  line-height: 140%;
  border-bottom: 1px solid rgb(241 245 249);
  padding-bottom: 15px;
}

::v-deep(.article-content h3) {
  font-size: 20px;
  margin-top: 40px;
  margin-bottom: 16px;
  font-weight: 600;
}

::v-deep(.article-content h4) {
  font-size: 18px;
  margin-top: 30px;
  margin-bottom: 16px;
  font-weight: 600;
}

::v-deep(.article-content h5) {
  font-size: 16px;
  margin-top: 30px;
  margin-bottom: 14px;
  font-weight: 600;
}

::v-deep(.article-content h6) {
  font-size: 16px;
  margin-top: 30px;
  margin-bottom: 14px;
  font-weight: 600;
}

/* p 段落样式 */
::v-deep(.article-content p) {
  letter-spacing: 0.3px;
  margin: 0 0 20px;
  line-height: 30px;
  color: #4c4e4d;
  font-weight: 400;
  word-break: normal;
  word-wrap: break-word;
  font-family: -apple-system, BlinkMacSystemFont, PingFang SC, Hiragino Sans GB,
    Microsoft Yahei, Arial, sans-serif;
}

/* 块引用 blockquote 引用样式 */
::v-deep(.article-content blockquote) {
  border-left: 2.3px solid rgb(52, 152, 219);
  quotes: none;
  background: rgb(236, 240, 241);
  color: #777;
  font-size: 16px;
  margin-bottom: 20px;
  padding: 24px;
}

/* 设置 blockquote 中最后一个 p 标签的 margin-bottom 为 0 */
::v-deep(.article-content blockquote p:last-child) {
  margin-bottom: 0;
}

/* 斜体样式 */
::v-deep(.article-content em) {
  color: #c849ff;
}

/* 超链接样式 */
::v-deep(.article-content a) {
  color: #167bc2;
}

::v-deep(.article-content a:hover) {
  text-decoration: underline;
}

/* ul 样式 */
::v-deep(.article-content ul) {
  padding-left: 2rem;
}

::v-deep(.article-content > ul) {
  margin-bottom: 20px;
}

::v-deep(.article-content ul li) {
  list-style-type: disc;
  padding-top: 5px;
  padding-bottom: 5px;
  font-size: 16px;
}

::v-deep(.article-content ul li p) {
  margin-bottom: 0 !important;
}

::v-deep(.article-content ul ul li) {
  list-style-type: square;
}

/* ol 样式 */
::v-deep(.article-content ol) {
  list-style-type: decimal;
  padding-left: 2rem;
}

/* 图片样式 */
::v-deep(.article-content img) {
  max-width: 100%;
  overflow: hidden;
  display: block;
  margin: 0 auto;
  border-radius: 8px;
}

::v-deep(.article-content img:hover, img:focus) {
  box-shadow: 2px 2px 10px 0 rgba(0, 0, 0, 0.15);
}

/* 图片描述文字 */
::v-deep(.image-caption) {
  min-width: 20%;
  max-width: 80%;
  min-height: 43px;
  display: block;
  padding: 10px;
  margin: 0 auto;
  font-size: 13px;
  color: #999;
  text-align: center;
}

/* code 样式 */
::v-deep(.article-content code:not(pre code)) {
  padding: 2px 4px;
  margin: 0 2px;
  font-size: 95% !important;
  border-radius: 4px;
  color: rgb(41, 128, 185);
  background-color: rgba(27, 31, 35, 0.05);
  font-family: Operator Mono, Consolas, Monaco, Menlo, monospace;
}

/* 表格样式 */
::v-deep(table) {
  margin-bottom: 20px;
  width: 100%;
}

::v-deep(table tr) {
  background-color: #fff;
  border-top: 1px solid #c6cbd1;
}

::v-deep(table th) {
  padding: 6px 13px;
  border: 1px solid #dfe2e5;
}

::v-deep(table td) {
  padding: 6px 13px;
  border: 1px solid #dfe2e5;
}

::v-deep(table tr:nth-child(2n)) {
  background-color: #f6f8fa;
}

/* hr 横线 */
::v-deep(hr) {
  margin-bottom: 20px;
}
</style>
